Signments



A ril 13 1926.

C. SCHLUNS cALcpLATInG MACHINE Filed April 5, 1924 12 She'ets-Shet 1' y A 0% 0 0 0 0" K ooo 0000o0o0 .C. Q V& v 0 GO O 0 W wwwwwwwwo A 000000000. 5 mmfifiw 000000000. F000000000@ 000000000 000000000 Y000000000 Q 000000000 0 1,580,858 c. scHL UNs CALCULATING MACHINE File p il 5, 1924 12 Sheets-Sheet 2 iii! 0 00 0000 00 000 0 0% llllll. w Qw kw U a Q .Q 7 0 \fiw Q6 '0 0 W? 000000000 1 E 0 000000000 fimflwmm 0000 V a1? 0000@ 0000 0000 0000 l l 0 00 0 2m mm April 13 1926.

April 13 1926.-

C. SCHLUNS CALCULATING MACHINE Filed April 5, 1924 12 Sh ets-Sheet s OOOOOO OOOOOOOO 00 000000000 000000000 OOGOOOQOC) OOOOOOOOC) 000000060 800 c. SCHLUNS CALCULATING MACHINE Filed April 5, 1924 April 13', 1926.

O O O O O o O 2/4 306 27/ Z06 12 Sheets-Shef 4 April 1351926. 1,580,858 C. SCHLUNS CALCULATING MACHINE 12 Sheets-Shet 7 Filed April 5, 1924 April 13 #1926.

1,580,858 c. SCHLUNS CALCULATING MACHINE Filed April 5, 192 Y 12 Sheet-Shef A ril 13 1926.

c. SCHLUNS CALCULATING MACHINE Filed April 5, 1924 12 Sheets-Sheet 9 l 13 1926. c. SCHLUNS CALCULATING MACHINE Filed April' 5, 1924 12 Sheets-Sheb 0 C 5:41am W C. SCHLUNS CALCULATING MACHIN E April 13", 1926. 1,580,858

ile pril. 5 1924 12 She'ei's-Shet 11 April 13, 1928. 1,580,858

C.SCHLUN$ CALCULATI NG MACHINE Filed pril 5, 1924 12 Sheets-Sh'f Patented Apr. 13,1926.-

ED STATES ,l,580,8558 caries.

CARL SGHL'U'RS, O]? STEGLITZ, NEAR IBEBIJN, GERMANY, ASSIGNOB, BY M- 1 SIG-ILIZMIEN'J!S, TO GUSTAV IMEZ, DOING BUSINESS AS MERCEDES WROMAgGEINEN 'UND WAIFENWEBKE.

CALCUL TING MACHINE.

Application filed April 5, 1924. Serial 110. 764,397.

To all whom it may concem:

Be it known thatI, CARL SCHLfi'NS, a

"citizen of Germany, resldingxat Bracken- .strasse 3, Steghtz, near automatic multiplication. process controlledfromcthe multi licator mechanism adjusted prior to the ca culation.

According to the invention a separate adjusting block composed ofseveral adjusting elements is provided for adjusting the multiplicator.v -A set of keys permits of controlling,,by means'of convenient intermediate elements, one of the adjusting elements according'to one figure of the multiplicator.

After this has been done the adjusting block moves for one step transversely to the set of keys so that-its next adjusting element.

gets into the position in which it is acted upon. In this manner a number of adjusting elements corresponding with the number of figures of the multiplicator mechanism are adjusted to the values corresponding with the several figures of the multiplicator.

The connection of the set of keys, intermediate elements and adjusting elements is either positively closing, any excessive mm ement being prevented y a separate locki ug element, or it is positively guided so that the locking element is not required. After this preliminary adjusting has been elfected the total value of the adjusting blocks is transferred to the multiplicator mechanism by a movement of the latter relative to the ad'usting block. For this movement the pullmi gout movement of the carriage of the counting mechanism maybe used which movement is necessary er se. A new adjusting of a new multip icator into the adjusting block is possible already while the machine is still working on the first problem.

The multiplication process is carried out he novel abbreviated manner. Every multiplicator axle which'has been adjusted to next higher place for one unit, without however alteringits own adjustment. This is attainedb means of transmission elements provided or eachplace which ascertain by feeling the adj usting of the places and effect the feeding of the neighbouring axles as they are operated bydriving means adapted to execute a movement relatively to them. By the provision of a corresponding number of driving means the feeding is ensured even when the axle which produces the same is brought by being fed itself, into an inoperative pos1t1on, and even when it is brought into the operative position only by the feeding. An automatic reversin mechanism controlsthe calculating machine in such a manner that all places with the figure are jumped in the well known manner, all

places with the li res 1,.2, 3, 4: or

5 are counted 1n the positive sense, viz,-

adding, all places with the figures 6, 7, 8 or 9 being however counted negatively, viz. subtracted. At the multiplication by the figure 8 for instance the factor in the adjusting mechanism of the machine, in-

stead of being added eight times, will be at first multiplied by 10 owing to the feeding of the next higher place, whereupon it is twice subtracted by the negative working off. of the 8 across 9 to 0, wherefrom results a considerable saving of time. The machine comprises a reversing mechanism in gear a mechanism of known type, which clears the adjusting mechanism after each complete calculation process. The ,basic machine to which the present invention is to be particularly applied is known as the Mercedes-Euklid and is described in Patent 1,011,617 or as'an entirely automatic power driven machine in the patent to Christel Hamann, Patent No. 1,566,961 of December devlce 1s provided for the multiplier an .means are provided for zeroizing the digits of the multiplier successively by unit steps.

That is to say, each number wheel of the setting device is uniformly returned to zero in a negative direction and as soon as a number wheel has'been returned to [zero the carriage is released and returns one step from. multiplication to'addition, which puts a According to this patent a setting wheel is brou ht into operative position.

in the zero posit-ion until a new key is de-.

pressed in the adjusting mechanism. This locking isefi'ected by a locking bolt known per se, which is released through the inter-' mediar of a rod system by the movement of the hey, while'its renewed releasing during the clearing operation ;is prevented by the utilization of an existing counter movement. The decimal and other subdividing signs are thus brought in a positive dependencyfrom one another in such a manner, that the adjusting of the signs in two counting mechanisms, which are independent the one of the other, produces automatically the mathematically correct adjusting of other signs in dependent counting mechanisms. .By means of a shaft grooved in spiral shape the displacement, for instance of the comma sign in the adjusting mechanism is transformed into a' rotating movement which is transmitted to a movable frame, carrying for instance the comma of the mechanism which counts the rotations,

where it is retransformed on-the frame itself also by a spiral groove into a displacement of the comma in the result. In this manner both displacements, that of the sign in the adjusting mechanism, and that of the frame are combined to effect the displacement of the third sign.

An embodiment of the invention is shown by way of example on the accompanying drawings, in which:

Fig. 1 shows in plan view the improved mechanisms connected 'with a Mercedes- Euklid calculating machine.

Fig. 2 is a similar view .as Fig. 1 the carria ebeing pulled out. ig. 3 is a similar view as Fig.1, the *cover plates being removed.

Fig.4 is a front elevation,the front plates being. removed.

Fig. 5 shows the ad'usting mechanism for the multiplica-tor mec anism' in elevationin the'position which it assumes at the pulling out of the carriage. Fig. 6 shows the same arrangement at renewed right hand adjusting of the carriage. Fig. 7 shows the same arrangement at the return travel of the carriage.

Fig. 8 isa plan view of this arrangement.

Fig. 9 shows infront elevation a special form of'construction of this'arrangement.

Fig. 10 shows separately the construction of the right hand part of this mechanism.

Fig. 11 is a plan view of Fig. 10.

Fig. 12 shows the transferring mechanism of the axles of the multiplicator mechanism in elevation.

Fig. 13 is a side elevation of Fig. 12.

Fig. 14 shows in plan view the control bars of this transferring mechanism.

. Fig. 15 is a perspective view of the transferring lever.

Fig. 16 shows by way of example an adj ustable eccentric.

Fig. 17 shows in perspective view one place of the multiplicator mechanism with the adjustingtransferringworking 0E- and control mechanism.

Fig. ,18 shows in a perspective rear view the automatical locking device for the crank and the annulling mechanism for the keys.

From the counter-carriage 1 (Fig. 1), which at the beginning operation has to be pulled out into the right hand .position shown inFig. 2, project eight multiplicator axles 2 to 9 of the multiplicator mechanism 10 to be adjusted. These axles carry adjusting Wheels 12 to 19 stepped in the manner shown in Figs. 3 and 8, and gearing temporarily with the racks 22 to 29 arranged below them. The guide bars 11 (Figs. 4, 5, 6, 7 and 8) in which the racks 22 to 29 slide are connected with one another by means of longitudinal members to.

form a frame which is suspended on levers 21 and 30 so that it can'oscillate around the pivots 31 and 32 to be raised, asshown in igs. 5, 6 and 7 up the height of the wheels. The raising is effected by means of a guide 33 for the roller 34 of lever 30, said guide being fixed on. the base late of the machine.

When the, carriage 1 1s pulled to the right as shown in Fig. 2 the roller 34 is pushed to the leftxby the surfaces 33 and maintained in this position. The racks 22 to 29 are in engagement (Fig. 5). At the reversing a spring 35 pulls the system into the position shown in Fig. 6" and springs 36 brmg the racks 22 to 29 back to the zero position. At the backward travel of the carriage the roller 34 gets into the sition shown in Fig. 7 (turned toward t e right) and the racks 22 to 29 are depressed still farther. The carriage 1 being in the position of'rest all axles 2 to 9 of the. counter mechanism are in the zero position as they have 'completed their work and all the racks 22 to 29 have been brought to the zero position by the action of their springs 36. .If these ends are made to strike, at the pulling of the carriage 1 into the. position indicated in Fi 6, against abutments 42 to 49 adapted to he adjusted at will, the racks 22 will be stopped sooner or later in accordanc with the position of theabutments 42""toj4 and the adjusting Wheels 12 to 19 coupled. with saidv racks 22 to'29. are rotated until the carriage position.

1 reaches the extreme right hand The racks-22 'to 29 which up to this moment have not encountered any abutment cause evidently 'no rotation of the coresponding adjusting wheels 12 to 19. The abutments consist of several adjusting elements 42 to 49 rotatably mounted the one at the side of the others upon a-common shaft 37 and usually held by springs 38 in they lowest position indicated in Figs. 4, 5 and 7. The

adjusting elements 42 to 49 have pawls 52 to 59 which are pivotally mounted on a common axle. 39. These pawls 52 to 59 which,.through the action of springs40, are pressed against a bar 41, securely held the adjusting elements 42 to 49 in their actuated position, these adjusting elements being turned in clockwise direction by means of a device which will be'hereinafter de scribed. The adjusting'elements 42 to 49,-

their springs 38* and pawls 52 to 59 are united in a block 50 (Figs. ,3'and 4 which, after the adjusting of each element has been completed,-moves stepwise on rails 50,simi-' lar to the movement of the carriage of a typewriting machine after the depression of a key. The adjusting elements consist of stepped sectors, the steps of which corre- .pond each to the adjusting of a digit from A two-armed lever 60 pivotally mounted on an axle 61, adapted to be operated by a system of ten keys 51 andnnaintained by The action of a'spring 62 in such a'position that at. the position of rest it is in contact with all the key rods 63, serves for the adjusting of the adjusting elements. The position of the key rods 63 and the shapeof.the arm 64 of the lever facing said key rods are selected so that by a downward stroke of the several key rods 63 for the same 1 length oscillations of different amplitudes are executed by the. arm 65 of the lever Y which is turned towards the adjusting elements 42 to 49, in accordance with the figu'res marked on the keys 51. One unit corstand opposite the rack 28, the second e1e-- responds to one shaft of the adjusting elements. On the last part of their travel the keys 51 act upon a feeding element which makes the block 50 advance stepwise in the direction-of the arrow 66, so that at the depre$ion of the next key 51 the followadjusting element is acted upon. I

l'he operation of this-arrangement is as follows: I V

In the initial position the'first element 42 is in the range of the lever 65. When a key 51 is being depressed this element 42 is rotated so thatthe step corresponding with V the figure marked on the key is brought to the level of the rack -29. The adjusting element 42 is maintained in this position by the pawl 52, The block 50 moves back from the machine for one step in the direction of the arrow 66 so that the adjusting elements ment 43 being situated over the lever 65, =whereu n this element 43 is raised by the depression of any of the keys 51, held by the .pawl 53, and the block 50 moves again away 'bar 67 may freely slide, but if one of the keys 51 is depressed an abutment 69 of bar 67 will strike against the rod of-the de-v pressed key so that the bar '67 is'stopped. The corresponding adjusting element 42. to 49 is thus stopped also and prevented to oscillate excessively. The stops 69 of bar 67 are arranged in such a manner that the "adjusting element (42 to '49) is free to oscillate in upward direction only when'the keyis being depressed. A spring 70 pulls the abutment bar 57-against the sector to be adjusted as soon as the block 50 has ad-- vanced for one step.

If after the adjusting of the elements the carriage is pulled to the right the racks 22 to 29 "strike against the elements 42 to149 I which have been adjusted. Owing to the stepwise arrangement of the adjusting wheels 12 to 19 the element 42 which has been adjusted by the depression of the first key acts upon the axleof the multiplicatormechanism 10 which corresponds with the highest place of the number which has been keyed. When the adjusting has been completed the bar 41 is moved to the right so that all adjusting elements'42 to 49 are returned to their initial position.

The number which has been set by the multiplicator keys is now transferred to the axles 2 to 9 of the multiplicator mechanism.

As soon as the carriage 1 with the racks 22 to 29 has moved in the course of the calculating process so far to the left that the raising of. the adjusting elements 42 to 49 is not impeded by the racks 22 t0'29 the block 50 is pulled back by hand, so that it is ready for new adjustment. This is effected before the calculation is completed, for instance after the third place has been worked. The adjusting of the number 325 would be as follows V l 7 Depression of the keys 51 marked with the figures 3 2 5 ,whereby the adjusting elements 42, 43, 44 are raised by the two armed lever 60, make the' abutment bar ,67 advance up to the abutment 69 against the depressed key 51, and are. held by the locking pawl 52, 53, 54: The element 42 stands opposite 27, the element 43 opposite 28 and the e1ement'44 opposite 29.

' The carriage l is nowpulled into the right hand end position whereby the racks ment with their corresponding wheels 12 to 19. The rack 29 strikes against the adjusting element 44 so that the adjusting wheel 19 gearing with the rack 29 is rotated so that to the corresponding multiplicator axle 9 the value 5 is communicated. The values 3 and '2 are adjusted in the same manner, so that the number 325 is registered in the multiplicator mechanism. The carriage-1 arriving at the extreme right hand position the racks 22 to 29- descend, disengage from the wheels 12 to 19 and are brought into the zero position by the action of the springs 36. During this last short travel the pawls 52 to 59 are released whereupon the adjusting elements 42 to 49 and also the block 50 return to the position of rest.

Fig. 9 shows a slightly modified construction of the feeling mechanism. The. lever 60'is composed of two levers 64 and 65 pivotally mounted on the pivot pin 61 and which are pulled the one towards the other so that the abutment 71 is in contact with the abutment 72. By a locking bolt 73 which bears against a downwardly projecting arm 7 4 of lever 65 this lever 65 is locked until the locking bolt 73 coming in contact with the left hand end of lever 64 descends and releases the lever 65. The keys 51 have each a laterally projecting pin 75 to 84 which are all situated at the sa1ne height and adapted to get in the path of one of the teeth 85 to spring 70.

94 of the rod 67, to limit the travel of this .rod. The rod 67 is moved by the adjusted element '42 to 49 with the aid of teeth 95 of the element gearing with teeth 96 of rod 67. l

The horizontal distances between the pins 75 to 84 and the corresponding teeth 85 to 94 correspond to the values of the figures marked on the keys 51. When a key 51 is being depressed only the left lever 64 is lowered at first in putting the spring 97 under tension. As soon as this leftend of the .lever 64 strikes against the locking bolt 7 3,

the nose 74 of lever 65 is released so that it acts upon the corresponding adjusting-eleinent42 to 49. The rod 67 is operated by this adjusting element 42 to 49 and moved until its tooth 85 to 94 strikes again st the corresponding pin 75 to 84 whereby the movement of thecorresponding adjusting, element is limited. The corresponding pawl 52 to 59 engages with the teeth of the adj usting element and holds ,the same in the raised or adjusted position. At each movement of the block-50 for the interval between the adj acentadjusting elements the rod 67 is disengaged from the adjusting element and pulled back by the action of This form of construction presents the advantage that no accurate adjustment between key 51 and height'of adjusting is necessary as the work of the keys is the same for each 'responding with the figures 6 to stepwise Lamaze -tionof the construction of the key mechanism which is characterized by the use of means which during the operation of 1 the keys produce a positive connection betweenkey 51, lever and adjusting element 42 to 49 so that no excessive rotation of the adjusting elements can occur even when the rod 67 is omitted. The lever 60 has inclined slots 98, 99, 100 designed to receive studs 101, 102, 103 respectively of the keys 51 when any key is depressed, said slots being of such a shape that at the end of the depression of a key the corresponding stud 101, 102,103 prevents excessive oscillation of thelever 60 around its fulcrum 61. The front part of the lever 60 has a stud 104 and each adjusting element 42 to 49 has a radial slit 105 designedto receive stud 104. As the stud 104 moves along a circle having the fulcrum 61 as centre it must'engage with slit 105 if the fulcrums 61 and 37 are conveniently arranged so that it prevents securely the automatic movement of the adjusting elements 42to 49. Referring particularly to Fig. 11 it will he understood that upon the settinggt a segment 5255 they will move together in the direction of the arrow whereby stud 104 is released from the segment just set and resumes its lower position as shown in Fi ,10, the movement of the segments being suc that said stud will be positioned below the slot of the next succeeding segment.

Each axle 3 to 9 of the counting mechanism (Figs. 12 and 13), except the axle 2, has a transmission lever 106, the upper! extension 107 of which bears upon the rim of a'cam disk 108 keyed onthe "corresponding axle 3 to 9, the cams of the disks or- 9 When the axle is being adjusted to 6, 7, 8 or 9 the corresponding cam disk 108 raises the extension 107 and consequently the transmission lever 106 so that its lower extension 109 is situated at the height of the. incline 110 adjacent to each transmission lever 106. All the transmission levers-106 are mounted at 111 in a common frame 112 bolt 120 of the sliding piece is drawn along by a catch 121'fixed on the carriage so that the spring 118is put under tension. An arm 1220f this catch 121 strikes against an abut ment-fixed on the base plate, so that, the carposition, the catch 121 is oscillated and re- -riage 1'being at the extreme right hand 5 essence piece 116 is pulled into its position of rest by the action of spring 118 (Fig. 14). The

inclines 110 on the sliding piece 116 are .moved along the multiplicator mechanisms 10 and act upon thosetransmissmn levers 106 the extensions 109 of which are in the path of said inclines. A third extension of the transmission levers, the transmission tooth 124, is .thus brought in engagement with the toothed wheels 125 for the next higher place, keyed on the axles 2 to 8, which are rotated for one tooth. If at this occasion one place is advanced from 5? to 6 the transmission lever 106 is raised by the cam disk 108. As the corresponding incline 110 has already passed along the lower extension 109 the transmission lever ascends behind the incline 110 and the further raising and transmission is effected by the'next following incline 110. After all operations have been completed the frame is oscillated in lateral directionthrough the action of guide rails 126 to 128 (Figs; 13' and 14). All extensions 124, 109 are thus brought, the return travel of the carriage 1,

with the inclines 110 and maintained in this position. The raised levers 106 drop back into the normal positions. The feeling lever 129 which is connected with the coupling of the machine allows the working of the machine only. when the sliding piece 116 is in i the position of rest, in contact with the left hand abutment 119. x

' The guide railsare arranged as follows On the left hand side of the casing of the multiplicatormechanism (Figs. 12 and 13) a control lever 131 is pivotally mounted on a pivot pin130. A stud 132 fixed in the frame 112 projects through the casing 113 into a slot 133 of the lever 131. When the sliding piece'116 is moving back into its position of rest the lower pin-shaped end 134 of lever 131 slides to the right along the rear 126, to be pushed forward at the right end of this guide rail by the guide piece 127, the above-mentioned transmission mechanism on the frame 112 being oscillated at this occasion, and the pin-shaped end 134 slides,

at the return travel upon the carriage 1- along the frame edge until the guide piece 128 efieots the re-engageinent of the same. The cam disks 108 are keyed in this, case on the axles 3 to 9. It would be easy to arrange the cam disks, with the aid of screws, pawls or the like, so that they are 'rotatable by themselves and to couple them with the-axles according to requirement so that the trans- I missionrange may be determined only prior to or during the"calculating. The earn 108' which eiiects thamovement of lever 106 'by means of the nose 107 is shown in Fig. 16 as being in two parts relatively adjustable.

e (Figs. 13 andg14) of the guide rail Iihe part 108 is fixed on the shaft and provided with an elongated aperture while the other cam part 108" is loosely arranged on the shaft. This last part has a threaded hole desi ed to receive screw 108 which extends through the slot of part 108. By means of the screw 108 the two parts are adapted to be rigidly connected. By loosening the screw however, the parts are relatively adjustable so-that the working surface of the cam can be increased or diminished so that an earlier or later oscillation of the lever 106 can be effected.

The'determination of the working direction of the machine, viz,the operation of the reversing (positive, viz, adding for the figure 1+5 negativezsubtracting of the figures 6-9) is efiecte'd by two reversing cams 135, 136, through the intermediary of the two filling elements 137,, 138 which operate the reversing rocking beam 139 the movements of which are communicated by the lever 140 and slide 141 to the reversing flap 142, which by means of lever 143' acts 'it's circumference. 'The wheel 148-for the lever 145, which feeds the axle in the positive directionlfrom 5 over 4? to zero) 'has five teeth, each of the teeth corresponding with one of the digits 1, 2, 3, 4, 5. The toothed wheel 149 for the other lever 146 which feeds the axles 3 to 9 in negative direction, (from 6 across 9 to -zero) has four teeth corresponding with the figures 6, 7, 8, 9. While lever 145 is working the .lever 146 is idle and in-' versely. The levers 145, 146 are. operated in the usual manner from the machine so that at every stroke of the crank the levers 145, 146 are reciprocated once (see lever 37 and associated linkage, Patent 1,566,961) .The releasing of the carriage at zero is effooted in the well. known manner by the zero cam 150 on the axles, 2to9 which, as

"soon as the axles 2 to 9 have arrived at zero produces the releasing of the carriage lflwith the aid of the intermediate element 151, as described in the above-mentioned patent. 1

Cam 136 is in the form of a segment corresponding in shape and disposition on the shaft with toothedsegment 148, and the same applies to earn 135 relative to segment 149 Thus, if the toothedv portion of either of segments 148 or 149 is in the path of its cooperating pawl when their shaft 3 -9 comes into working position, the corresponding cam will be in position to abut and depress one of the filling piecesand correspondingly rock member 139. The correct adjustment of lever 144 is thus effected throughthe described linkage. The filling pieces 137 and 138 are pivoted at their left ends for-vertical oscillation. For the sake of simplicity, however, they may be omitted as non-essential.

The lever-143 displaces the reversing flap 142 whereby the reversing nose 152 is made to e'nga e either with the slide 154 belong-v ing to t e zig-zag bar 153 (for division) or with the slide 141 belonging to the reversing 'rocking beam 139 (for shortened multi- .plication).. At division the counting mechanism 155 (Figs. 1 to 3) for the rotations adds when the. calculating mechanism subtracts and inversely the method of carrying out shortened multiplication may be best understood from the following example: If for instance by means of the multiplicator ke'ys 51 (Figs. 1 to 11) one sets up the number 98, the noses 107 of the levers 106 will be lifted by the cams 108 and abutmentsl109 will be brought into the path of abutments 110. Upon drawing the carriage to the i right as in Fig. 2, as has been described above, the 9 will be advanced one place by the nose 124 (Fig. 12) of the lever 1'06 machine and the multiplicand has been-multiplied by one hundred. Zero having appeared the machine carriage is released. by

cam 150 in the same manner as has been described in Patent 1,566,961 mentioned above. v Since a zero appears in the next place of the multiplier the machine carriage will not stop at this place but will move on to the units place in which the 8 has been set .up.'. Upon the entrance of this 8 into the working position the shaft on which this fi ure is represented will be advanced two p aces to zero two revolutions of the operatlng crank being necessary. At the same tlme by means of members-135, 139, 140, 141, 152, 142, 143' and 144 the calculating mechanism and rotation counter have been set to subtraction, in known manner. Thus the two too many multiplications'made by the multiplication in the hundreds place have. been subtracted. It is thus obvious that in making the ,multiplication by the shortened method only three turns of the crank handle have been necessary although in making the same calculation 17 revolutions of the crank handle would be necessary if the device according to Patent 1,566,- 961 were used. From the above example it is evident that by shortened multiplication the revolution counting mechanism adds .when the calculation mechanism adds, and

vice versa. The parallel and cross connec tions required for this purpose consists of the lever 158 (Fig. 17) adapted to be oscillated around its foot pivot 157, the reversing rod 161 of the counting mechanism 155 for the rotations (Figs. 1 -to' 3) at the upper traverse 159 of lever 158 being adapted to be displaced by the action of the right hand control lever 160. It will be noted'that lever 144 has a pin engaging one end of lever 158, while rod 161 is at one end of an elongated transverse slot atthe other end of the lever. Thus, upon switching lever 144, rod 161 will be reciprocated. When division is to be done, lever 160 and rod 161 take the position shown indotted lines.

As is known .the Mercedes Euklid calculating. machine maybe provided with a keyboard, and in Fig. 18 such a keyboard is shown with the side walls removed. In

the known manner the depressed keys are its lower portion the hooked shaped ends 166 of the locking bars'261. By such a rocking movement of the flap '174 the looking bars 261, of which one is provided for each row of keys, is moved contrary tothe direction of arrow 162 until the projections 260 release 'pins259. In addition the release of the depressed keys is totake placeafter each crank rotation. This is brought about. in the following manner. To the' frame of the ke board an angle lever 188 is pivoted and this'has pivoted to its arm 189 by means of screw 185a lever 186, which is pivoted at its upper end to the draw bar 175. A collar 181 is fixed to the drive axle of the machine and this collar has a nose 182 on its circumference, a lever 183 is pivoted to. the machine frame and has a nose 184 which cooperates with nose 182, and this lever is normally urged in a counterclockwise direction by means of a spring not shown. After rotation of crank 256 in clockwise direction for about '345 degrees the lever 183 is rocked about its pivot point 1n clockwise direction due to the contact of noses 182 and" 184. The lever 183 transmits this movement to lever 186, which in turn pulls bar inthe direction of the lac i is to add a different value.

messes arrow, thus swingin flap 174 and releasing the keys. The descri ed operation only takes place at addition, when each crank rotation Under such circumstances the lever 188 which projects .through the top of the machine is moved flap 174 remains at rest so that the keys remain depressed until bar 175 is actuated, which may be done by hand through suitable provisions.

At addition, in order to carry over a value to the counting mechanism, one crank rotation of 360 degrees-is necessary. If this rotation is overstepped, even for a short distance, the keys are released but 1 is added in the counting mechanism. This mistake must then be corrected in known-manner, causing the loss of much time. In order to prevent such overstepping a crank lock 7 is provided which, after a rotation of 360 degrees, locks the crank so that it can not again be rotated until the depression of a key of the keyboard. ihis locking mechanism is arranged as follows:

A fiap.16.5, provided with journals 163, is parallelly arranged to the released flap 174 and the journals of the two flaps rest in the same bearing block. Flap 17 1 has at P its upper portion a pin 173 and flap 165 has a pin 167 at its lower portion. Both of these pins are connected by means of a bar 169, which is provided with a stud exactly at its center point. By means of this stud the bar 169 carries a rail 172 which extends along the keyboard and is connected to a latch 177, as shown. Latch 177 is pivotally attached to the mainframe andis continually urged in counter-clockwise direction by means of a. spring, so that it has the tendency to contact with .its free arm against the collar 181. Normally this freearm is in the path of a. lever 17 8'which is pivotally mounted in the collar and is continually urged by means of spring 179 in a clockwise direction. The operation of this locking mechanism is as follows At the depression of the key the locking bar 261 is displaced in known manner in opposite direction to arrow 162 by the'action of pin259 on the upper oblique surface of projection- 260. At the movement 'of the locking bar 261 the releasing flap.174; remains at rest although the flap 165 undergoes a rocking motion in a counter-clockwise direction moved by the end 166 of the lockmg bar. Consequently the bar 169 executes a counter-clockvs 'ise oscillation about pin 173. The rail 172 is consequently displaced in opposite direction to the arrow and latch'177 is swung in clockwise direction, Lever 178 is normally so positioned that it abuts the free end of latch 177 and is in turn abutted by the end wall of the recess ofthe collar in which it lies, so as to prevent a rotation of crank .256. \Vhen latch 177 is swung as described, however, lever 178 is freedand is drawn by means of spring'179 to the other end of the recess whereby crank 256 is released. After this has taken place the lever can be turned through 360 degrees again since lever 178 again strikes latch 177 which has been returned into cooperating position through the action of its spring.

If rod 175 is actuated by hand for the key release, latch 177 must remain in look-- ing position until the keys have been set again. This is efl'ected in that upon rocking flap 17d and with it flap 165 simultaneously in counter-clockwise direction, stud 170, on account of its disposition, remains at. rest and does not influence link 172.- The unlocking of the crank takes place only when bar 169 isrocked about pin 173 and not when pins 173 and 167 are rotated in the same direction and stud 170 lies at the center of their circular movement In order to render the crank lock inoperative at multiplication, link 172 has an upright arm 191 which extends into the vicinity of lever 188. Upon moving lever 1'88 from A to M it -.abuts arm 191 with its nose 190and dislaces the link 172 oppositely to arrow 162 so that the latch 177 is brought out of reach of lever 178. This displacement of link 172 has no effect upon the two flaps, since slot 171 permits a free rearward movement relative to stud 170.

Onthe stationary part of the calculating machine 192- (Figs. 1 to 1), the feeding mechanism, a shaft 19i is journaled in the bearings 195 and 196 and extends transversely to the windows 193 of the figure adjusting mechanism. A groove 197 of spiral shape is cut into the circumference of shaft 19 1. The decimal index finger 199 is adapt-V ed to slide on a stationary guide bar 198 for the carriage. A stud 200 of this decimal index finger projects into the spiral-shaped groove 197 so that when the index finger is shifted the shaft 194 is rotated. The decimal index finger 199 hasa handle. On the outer end ,of shaft 194a gear wheel 201 is keyed (Fig. 3) which meshes with a gear wheel 202 keyed on a square shaft 204 journaled at 203.' On the carriage 1 of the machine a guide 205 is arranged which permits of shifting a frame 206 by means of a handle 207. A decimal index for'the rotation counter 155 is keyed on frame 206. .On the web 209 of the frame 206 slides the deci mal index finger 210 for the main counter 156. This index finger 210 is controlled by a sleeve 211 rotatably mounted on the frame 206 andhaving a spiral shaped groove 212 with which engages a stud 213 of the index finger 210. A plate 214 rigidly connected with-sleeve 211 has a square hole in which the square axle 204 is mounted the length of which corresponds with the extreme right hand position of the carriage 1, so that the plate 214 and the mechanisms conn ected with this plate (frame 206, sleeve 211, decimal index finger 210) are adapted to be fshifted'on this square axle.

By this connection, the carriage 1 and on the same the frame 206 may be freely moved, every rotation'ofv the square axle 204 being transferred to the sleeve 211and causing a shifting of the decimal index finger 210 in the main counting mechanism 156. The tooth wheeltransmission of the gear wheels 201, 202 is selected in such a manner that the displacement of the decimal index I finger 199 for a number of places in the adjusting mechanism 193 produces a displace ment of the decimal index finger 110 for the same number of places with regard to the frame 206. The frame '206 may be displaced itself, the decimal index finger 208 indicating the number of places and the decimal index'finger210 participating in this dlsplacement. As the product or the dividend is contained in the main counting mech.a-

nism, 156, the one factor or divisor being contained in the adjusting mechanism 193 and the other factor or,quotient in the rotation counter 155, the number of the places separated from the right by the decimal index finger 210 must be equal to the sum of the places separated by the index fingers 199' and208. The movable frame 206 possesses "with regard to "the carriage 1 of the counting mechanism 'a' much greater friction, which might be increased by. shallow notches, then the friction of the square axle 204 in the guide disk 214.

The operation and working of the mechanisms is as follows whenthe carriage in the, left hand osition: P

The one factor in the adjusting mechanism 193 and the other factor in the rotation counter 155 are adjusted. In the adjusting mechanism 193 the decimal index finger 199 is shifted to the desired place whereby the decimal index finger 210 is displaced for the same number of places. The other factor is then adjusted in the rotation counter 155 and subdivided by the decimal index finger 208 by displacement of the frame 206 whereby the decimal index finger 210 is operated again and'moved for the same number of places so that it is preliminarily adjusted to visor in'the adjusting mechanism 193. The

decimal index fingers 199 and 210 are to be adjusted in the manner described above so that the decimal index finger 208 is preliminarily adjusted automatically to the correct place of the quotient which will appear later on i n the rotation counter 155.

As example the following calculation will be cited:

A.Maltiplication.

Problem 234,5634 33,624

1. Adjusting of the first factor 2345634 in the, adjusting mechanism 193.

2. Shifting of the comma 199 so that it stands between 4 and 5.

3. Multiplication in thewell known manner'b 33624. 7

4. hitting of the frame 206 until the comma 208 stands between 3 and 6.

5. Reading of the result 7886,9597616 with the aid of the automatically adjusted comma 210.

B.- Dv'/visz'on. Problem 224,386 :3,85

1. Adjusting of the dividend 224386 in the main counting mechanism 156 (left).

2. Adjusting of the divisor in the adjusting mechanism 193 (left).

3. Shifting of the. comma 199 .until it stands between 3 and 8 (3,85).

4. Shifting .of the frame 206 until the comma 210 stands between 4 and 3 v209 or on the carriage guide 205 several marks standing at permanent or adjustable distances apart may be arranged instead of the one mark only. Other counting mechanisms might also be considered, for instance themultiplicator mechanism, or a multiple subdivision of a number, for instance into A s1m1-.

milliards, millions and thousands.

lar transmission might be used for another.

counting mechanism carriage, for instance for calculating machines with double ruler. I claim I 1. In a calculating machine having a carriage adapted upon releasein a limit position of travel to control a calculating proc- I ess', a plurality of transmission elements in saidv carriage, an adjusting .mechanism,

means for setting said adjusting mechanism 

